[smitty]

Yup, that's a 620.

http://www.nostalgiaair.org/Resources/804/M0013804.htm

Six tubes...correct?

your right about the six tubes. the only info my dad got with the radio is that it was a 1935. and the model number tag is Missing.
we looked at the schematics we found, but its not as clear as a wiring diagram would be.
i could post a scan of it if it would help.
i also could post a picture of the cabinet if needed.
the one thing we think we figured out from my notes is the console is #10175
its an S-14 speaker
voice coil and cone #36-3157
field coil and pot #36-3495